Have not found anything on wheel spacers and the 1k xp4. This is only a dune machine with 30" skats in the rear and STU Tributes in the front. I like to run fast and jump but am curious if they will weaken the suspension or change the geometry? Adding 4" of width would sure seem like it would be very stable but I wouldn’t want the wheels falling off when I land a big jump! Anyone have any real world input?